Well I heard that it was 20 too, and I made a slash mark on a piece of
paper for each one that I killed so that once I got to the 20th I would
just kill the tonberry without using Mad Rush that time, but it came up
on the 17th and I killed him with 1 character alive: Squall, and a little over
100 HP on him. ;\

I hadn't saved since the 5th tonberry either so if I had died I'd probably
be under ground with a big hole in my head. ;p

.opt